Post #3047669

To my knowledge, which is often wrong, that's necessary. It's a proof of work system, so your browser has to receive the challenge work, create background workers to do it, then submit the results and get authenticated. If the work wasn't challenging (slow), then it wouldn't be any impediment to scrapers and bots. Whether there are alternatives to proof of work that work well, I do not know. But fingerprinting alone is actually very difficult.